As we all know, sun exposure will be the formation of stains, wrinkles, loose skin, but these are only our naked eye can see. In fact, it would result in cells with genetic damage to a certain extent, some cells were killed on the spot, while others will be injured cells release a chemical substance to stimulate the capillary, resulting in its rupture, and that is our usual sense said drying red. Especially UVA could penetrate the skin, damage to DNA, so that the skin loses elasticity, also cause serious skin cancer.
Everyone should be aware that UV radiation is not heat, such as at the seaside, mountain climbing or skiing, you will feel cool, ultraviolet cherish extremely strong.
In fact, 50% of the ultraviolet through the parasol, it can only isolate people to have burning sensation of the UVB, while UVA can penetrate without difficulty parasols.
UVB can stimulate melanocytes, the skin dark, while UVA will make skin allergies, starting spot, so both products is the best sunscreen products.
The effectiveness of sunscreen to know that there is a certain time limit, do not think that a major contributing factor on all OK. Hot summer weather, easy to sweat, sunscreen would be obliterated, wiped up the work is important. Generally to do outdoor activities, in order to sustain the effects of UV, every 2-3 hours on the need to clean up first. Swimmers should be at any time after the water dried, re-applying sunscreen.
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